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发明名称
Device for scraping and testing well tubing
摘要
申请公布号
US2668593(A)
申请公布日期
1954.02.09
申请号
US19500138669
申请日期
1950.01.14
申请人
SUN OIL COMPANY
发明人
HAY LEHMAN E.
分类号
E21B37/04
主分类号
E21B37/04
代理机构
代理人
主权项
地址
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